It is mainly used during one part of the mission "Victor Charlie" to kill certain enemies, usually in scripted events. Once the player is given a weapon, it will be replaced with the standard knife. It acts as a main weapon in half of the level "Victor Charlie" and has the same power as a regular knife, being able to kill in one hit.

This weapon is also available as an Emblem, in the Emblem Editor in Multiplayer.

In the mission "Pyrrhic Victory", Raul Menendez uses an SOG Knife in an attempt to stab Alex Mason but Mason quickly countered his attack and shot him in the eye. It cannot be used by the player. In the mission "Suffer With Me" the SOG Knife is used as a throwing knife by Frank Woods.

In order to get the Up close and personal achievement, the player has to use this knife to take out three guards. The player has to kill two of them and the third one is located sleeping in a bed to the right in a hut that Mason and Woods pass through.

The blade of the knife has twelve tally marks on it.

If one switches from the SOG knife to another weapon and back again, the knife will go through the player's fingers.

If the knife is dropped for another weapon, it cannot be picked up again.